Global Patent Index - EP 2833231 B1

EP 2833231 B1 2017-10-04 - Gas burner having a servo gas system with a hydraulic Wheatstone-bridge controlling an electric fuel supply valve, and method of operating such a gas burner

Title (en)

Gas burner having a servo gas system with a hydraulic Wheatstone-bridge controlling an electric fuel supply valve, and method of operating such a gas burner

Title (de)

Gasbrenner mit einem Servogassystem mit einer hydraulischen Wheatstone-Brücke welche ein elektrisches Brennstoffzufuhrventil steuert, und Verfahren zum Steuern eines solchen Gasbrenners

Title (fr)

Brûleur à gaz ayant un système de gaz d'asservissement avec un pont hydraulique de Wheatstone réglant une soupape électrique d'alimentation en carburant, et procédé pour le réglage d'un tel brûleur à gaz

Publication

EP 2833231 B1 (EN)

Application

EP 13178379 A

Priority

EP 13178379 A

Abstract (en)

[origin: EP2833231A1] Servo gas system (11) realised as a modified hydraulic Wheatstone bridge for a gas burner (10), namely for controlling a pressure regulation valve (20) positioned in a gas duct (18) of the gas burner, thereby controlling a pressure difference between a pressure (P1) in a burner chamber (12) of the gas burner and the gas pressure (P6) within the gas duct (18). The hydraulic Wheatstone bridge embodiment comprises a static servo gas flow branch (28) and a dynamic servo gas flow branch (29) being connected in parallel, a flow sensing element (30) being connected between the static servo gas flow branch (28) and the dynamic servo gas flow branch (29) and providing a signal used to control the pressure regulation valve (20) by an electric actuator (41). The static servo gas flow branch (29) comprises a first (32) and a second flow restricting device (33) in serial connection. The dynamic gas flow branch (29) comprises a pressure regulator (37) and downstream of the pressure regulator (37) a third flow restricting device (38) in serial connection. The flow sensing element (30) is connected to the connection between the two flow restricting devices (32, 33) of the static servo gas flow branch (28) and to the connection between the pressure regulator (37) and the third flow restricting device (38) of the dynamic servo gas flow branch (29). The pressure regulator (37) is further connected to a reference pressure, preferably the combustion chamber pressure (P1).

IPC 8 full level (invention and additional information)

G05D 16/20 (2006.01); F23N 1/00 (2006.01); F23N 1/02 (2006.01); F23N 5/18 (2006.01)

CPC (invention and additional information)

F23N 1/022 (2013.01); F23N 1/002 (2013.01); F23N 1/005 (2013.01); F23N 1/007 (2013.01); F23N 1/025 (2013.01); F23N 1/027 (2013.01); G05D 16/202 (2013.01); F23K 2900/05002 (2013.01); F23N 2005/185 (2013.01); F23N 2025/04 (2013.01); F23N 2025/06 (2013.01); F23N 2035/16 (2013.01); F23N 2039/04 (2013.01)

Citation (examination)

None

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

EPO simple patent family

EP 2833231 A1 20150204; EP 2833231 B1 20171004; US 2015030986 A1 20150129

INPADOC legal status


2017-11-16 [REG DE R096] DPMA PUBLICATION OF MENTIONED EP PATENT GRANT

- Document: DE 602013027385

2017-11-01 [REG IE FG4D] EUROPEAN PATENTS GRANTED DESIGNATING IRELAND

2017-10-15 [REG AT REF] REFERENCE TO AT NUMBER (EP PATENT ENTERS AUSTRIAN NATIONAL PHASE)

- Document: AT 934598 T

- Effective date: 20171015

2017-10-13 [REG CH EP] ENTRY IN THE NATIONAL PHASE

2017-10-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2017-10-04 [REG GB FG4D] EUROPEAN PATENT GRANTED

2017-09-13 [INTG] ANNOUNCEMENT OF INTENTION TO GRANT

- Effective date: 20170821

2017-08-09 [INTC] FORMER COMMUNICATION OF INTENTION TO GRANT CANCELLED

2017-04-05 [INTG] ANNOUNCEMENT OF INTENTION TO GRANT

- Effective date: 20170309

2016-11-30 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20161026

2015-09-09 [R17P] REQUEST FOR EXAMINATION FILED (CORRECTION)

- Effective date: 20150804

2015-09-09 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2015-02-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20130729

2015-02-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2015-02-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: BA ME